Master plumbing study guide Questions With Complete Solutions

Air break correct answer: A piping arrangement in which a drain from a fixture appliance or divice discharges into a receptor at a point below the flood level rim and above the trap seal Air chamber correct answer: Now called water hammer arrestor Air gap drainage correct answer: Unabstructed vertical distance between the outlet of the waste pipe and the flood level rim of the recptor it is discharging "air gaps are required where backflow can occur due to back siphonage" Air gap water distribution/ effective opening correct answer: Vertical distance between the lowest opening,pipe, faucet supplying water to a tank fixture or other device and the flood level rim of the receptor. diameter of the fixture discharge is the effective opening. Battery fixtures correct answer: Any group of two or more similar adjacent fixtures that discharge into a common horozontal waste or soil branch. Can be battery vented in up to groups of 8 fuxtures Clinical sink correct answer: A sink primarily for waste very similar to the characteristics of a toilet Combination fixture correct answer: Kitchen sink or laundry tub that has one trap for 2 compartments tied in within 30 inches of the trap Conductor/ rain leader correct answer: Vertical drain pipe within the building that convays storm water from the roof to its connection to the building storm drain or other point of disposal Rain leader is the same but on the exterior of the building. Critical level correct answer: The bottom of the back flow preventer unless stamped on the back flow prevention device by the manufacturer that determines the minimum elevation above flood level rim. Load factor correct answer: The percentage of the total connected fixture unit flow which is likely to occur at any point in the drainage system Local ventilating pipe correct answer: A pipe on the fixture side of the trap which vapor or foul air is removed from the fixture Reduced pressure zone backflow preventer assembly correct answer: Provides the highest level of protection against back pressure backflow. SDR correct answer: Abbreviation for standard dimensional ratio that relates to the specific ratio of the average specified outside diameter to the minimum wall thickness for outside diAmeter controlled plastic pipe Prohibited traps correct answer: Traps that depend upon moving parts to maintain their seal, Bell traps, crown vented traps, separate fixture traps that depend on interior partitions for their seal,, S traps of uniform internal dimension, drum traps Clean out spacing minimum pipe length distances correct answer: 4 inch pipe size or less is 75 feet. 5 inch pipe size and larger is 100 feet. Cleanouts in terms of change in direction correct answer: Cleanouts shall be installed at changes of direction in draina